Check valve for flushometers



J. L. BECK CHECK VALVE FOR FLUSHOMETERS Filed Jan. 20. 1920 al a a Patented .inne l?, i924.

STATES` JOHN L. BECK,` or SPRINGFIELD, MASSACHUSETTS.

CHECK VALVE FOR FLUSHOMETERS.

Application filed January 20, 1920. Serial No.' 352,686.

This invention relates to a check valve forV a flushometer which is a device for controlling the supply of water to water closet bowls, and the primary object I have in view is to provide an article of the character set forth which is simple in construction, positive in action and` which is practically or nearly noiseless. In Letters Patent i No. 1,171,085 issued to me February 8,1916 is an article of the same general kind and the present. device is in the nature of an improvement of that described by the patent and others of the same type which itis ofcourse not necessary for me to more particularly identify. i

In the` drawing accompanying and forming a part of the present specification I have shown in detail a form of embodiment of the invention which to enable those skilled in the art to practice the same willbe set forth fully in the following description. I

am not restricted to this particular disclosure.

I may depart there-from in several respects within the scope of the invention defined by the claims following said description.

Referring to said drawing:

Fig. 1 is a vertical section of the flushometer. i

Fig. 2 is a oros sectional view in top plan.

Fig. 3 is a-fvertical section on the line 3 3 of Fig. 2.

Fig. 4L is a perspective view of a valve member.

Like characters refer to like parts through out the several views.

The article set forth herein is what is known in my prior patent as a lushometerit Sometimes it is termed a flush valve. Gbviously it involves a valveof suitable character. When this valve is opened a supply of water is caused to flow to a part ordinarily a water closet bowl. v

The flu'shometer comprises in its makeup a casing such as that denoted in a general way by 2 the base portion 3 ofwhich has an `internal.ly-threaded hub or boss 4 to receive the pipe 5. for :the supply of water` to the service pipe 6 when :the valve or valves hereinafter described are opened. The supply pipe 5 as shown is litted as by threading intol the hub or boss 4c of the base portion 3 while the service pipe 6 is lit-ted as by threading to the hub or boss 7 on.` the oppositeside of said base portion 3. Thebase portion 3 is divided by a wall or partition 8 situated between the supplyr and service pipes 5and 6 respectively this wall orpartition 8 having an` opening or port 9 controlled by valves as I will hereinafter explain. When a valve or `both valves are opened, water will fflow from the supplyfpipe through the port 9fto the service pipe 6 quired. f

The valve mechanism as well as the other parts/of the device may vary decidedly in that the invention covers vcertain broad relat-ions.` I will however describe a `valve mechanism which meets my requirements.

This mechanism involves a primary valve as 1() connected in some suitable way to the` and be discharged as re-- lower end of the stem 11. `The primary valve closes against the centralopeningin the secondary valve 12. It should be noted that while I call the valves 10 and 12 primary and secondary, I do not necessarily mean to imply thatone is subordinate to the other. As a matter of fact, it will be clear, that it is not always necessary to employ them both and there may be times in fact where valve mechanism of an entirely dierent character could be utilized. The primary valve 10 when closed, fits against a seat at the lower rside of the central opening of the secondary of the valve 12`and obviously into the serv-y ice pipe 6. On the further downward movement of the stem 11 the arms 13 which fit in the opening 9 will directly engage the said opening and to admit a further supply of water therethrough. The arrows in Fig. l show the directionof flow of thewater from the main or kpipe 5 to the service pipe.

yvalve 12 and ycause the latter to luncoverr Y casing 2.

The casing 2 comprises a chamber as 15 the bottom of which constitutes the top of the base portion 3 and the valve stem 11 .extends through a gland 16 in said top.

This chamber is adapted to contain a liquid of suitable kind suoli for instance as oil. In said chamber 15 is vertically movable or slidable a piston or plunger as 17 of practically cupped form and which may be peripherally packed as shown. This piston or plunger 17 moves with the stem 11 the latter having an enlarged portion 18 extending through a central opening of the piston and having at its lower side a collar kor flange 19 fitted against the under side of the piston or plunger. The upper part of this enlarged portion 18 is threaded to receive the nut or washer 2O which bears against the upper face of the piston or plunger and thus provides a simple means for connecting the piston or' plunger with the stem for movement therewith.

Around the stem 11 is the Ycoiled spring sired, by way of said opening 23.

` i3 set forth.

The body of the piston or plunger 17 has in its upper side a short distance from the center thereof the cylindrical cavity 25, the bottom of which is concaved as at 26 and from the cavity leads the port or opening 27. This cavity or socket 25 receives in it the `valve 28 convexed on its under side to fit solidly against the concaved surface 26 when said valve is-closed at which time thevalve closed the opening or port 27. Upward or opening movement of the valve 28 is limited by the overhanging portion of the nut or washer 2O to which I have already referred, at which time the valve 28 is open its maximum extent, having been opened by the pressure of liquid against its concaved surface 26 when the plunger or piston 17 is pushed downward to flush as I will later This valve is of triangular form in cross section being practically of an equilateral form, its top being somewhat iattened. It freely or easily fits the cavity or chamber 25. Said valve 28 has centrally in its upper side thereof the opening 29 into which lead the three ports 30 from the exterior surface of the valve.

It will be assumed that the piston or v plunger 17 is at the limit of its upward movement and that it is thrust downward,

as I will later explain. On such downward movement the pressure of the liquid in the chamber 15 below the valve, passing through the port 27 will vstrike the under convexed surface of the valve'and will instantly open or raise it as the piston moves downward, the oil or equivalent liquid flowing through the ports 80 and out of the opening 29 to the upper side of the chamber 15 or above the piston 17 therein, this continuing until the piston reaches the downward limit of its movement. As the piston moves up, liquid above the piston will at once close the valve 28 or cause its convexed surface to seat against the concaved surface 26 and thus close the port 27 During the downward movement of the piston the valves 10 and 12 one or both to which I have already referred, will open for purpose of flushing. On the upward movement of the piston the liquid is by-passed from above the piston to below it, the closing or ascent of the piston being a comparatively slow one.

Chamber 415 may have a by-pass passage 32 flow of liquid through which is governed bythe valve 33.

To effect the action of the stem and therefore of the valve mechanism to obtain a supply of water a handle as 42 may be provided the handle having a shank 43 extending therefrom into the cap 41 and having in the cap a convexed foot 44 which is adapted to engage the upper endof the stem 11. The cap 41 is furnished with an inwardly extending flange or lip 45 which overlies the foot 44 and thus holds the handle 42 and its shank in proper position, obviously limiting the upward movement of the handle.

To secure a supply of water to the service pipe 6 the handle 42 is grasped and thrust downward thereby causing the lowering of the stem 11 and the resultant opening of the primary valve 10. Should the downward motion of the handle be continued, the secondary valve 12 is opened in the manner I have alreadyV described to obtain a further flow of water. On the lowering of the parts the valve 28 is opened or thrust upward thereby permitting the upward flow of oil. When the handle 42 is released after flushing has been accomplished, the valves 10 and 12, if the latter be opened, are permitted to close due to the retraction of the coiled spring 21 the plunger or piston 17 moving up in accordance withthe rate of iiow of the liquid in the chamber 15 through the by-pass passage 32. The instant the piston or plunger 17 commences to rise the valve 28 is at once closed and the oil is bypassed through the passage 32 from aboveA to below the piston or plunger 17.

What I claim is:

1. A part having a cavity and also having a port leading from said cavity combined with a valve inthe cavity, the valve and the cavity having convex and concave portions which are adapted to engage When the valve is closed, the valve being of triangular form in cross section having ports in its several side faces, and alsoy having an opening into which said ports lead.

2. A part having a cavity and also having a poi-t leading frornlsaid cavity combined with a valve in the cavity, the valve and the cavity having convex and concave portions Which are adapted to engage when the valve is closed, the valve being of triangular form in cross section having ports in its `several side faces, and also having an opening into which said ports lead, the corners of the valve being truncated.

In testimony whereof I affix my signature in the presence of two Witnesses.

JOHN L. BECK.' Witnesses: f

HEATH SUTHERLAND,

- FRANK L. PALMER. 

